CN218377743U

CN218377743U - Flow control valve

Info

Publication number: CN218377743U
Application number: CN202222586805.1U
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Climate and Appliance Controls Group Co Ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2022-04-01
Filing date: 2022-09-28
Publication date: 2023-01-24
Anticipated expiration: 2032-09-28

Abstract

The application discloses flow control valve, including valve body component, lid, setting element, valve rod and case part and uide bushing, the lid with valve body component fixed connection, the setting element with lid fixed connection or the setting element with lid structure as an organic whole, the uide bushing with case part fixed connection, the uide bushing overcoat the setting element, the uide bushing with setting element sliding fit, the valve rod with the case part is connected, the valve rod can drive the case part with the uide bushing is relative setting element endwise slip, the case part can with flow control valve's valve port butt or separation compare in the background art, the processing technology of lid is simple.

Description

Flow control valve

Technical Field

The utility model relates to a fluid control technical field, concretely relates to flow control valve.

Background

Fig. 1 is a schematic structural diagram of a control valve of the background art, and as shown in the figure, the control valve comprises an upper cover 01, a valve body part 02, an operating rod 03, a valve clack 04 and a sleeve 05. As shown in the figure, the upper cover 01 is provided with a cylindrical part 011, the sleeve 05 is fixedly connected with the valve clack 04, the operating rod 03 can carry the valve clack 04 and the sleeve 05 to move in the axial direction of the control valve, and the outer wall of the sleeve 05 is in sliding fit with the inner wall of the cylindrical part 011 during the axial movement of the sleeve 05. The inner wall of the cylinder part 011 is provided with a circle of annular grooves, and the sealing ring 06 is arranged in the annular grooves for sealing. In the control valve, the upper cover 01 is complex in shape and inconvenient to process.

SUMMERY OF THE UTILITY MODEL

An object of the application is to provide a flow control valve, including valve body part, lid, setting element, valve rod and case part and uide bushing, the lid with valve body part fixed connection, the setting element with lid fixed connection or the setting element with lid structure as an organic whole, the uide bushing with case part fixed connection, the uide bushing overcoat the setting element, the uide bushing with setting element sliding fit, the valve rod with the case part is connected, the valve rod can drive the case part with the uide bushing is relative the setting element axial slip, the case part can with flow control valve's valve port butt or separation are compared in the background art, and the lid is convenient for process.

Drawings

FIG. 1 is a schematic diagram of a control valve according to the prior art;

FIG. 2 is a schematic structural diagram of a first embodiment of a flow control valve according to the present application;

FIG. 3 is a schematic structural diagram of the cover in FIG. 2;

FIG. 4 is a schematic structural view of a spool member of the flow control valve of FIG. 2;

fig. 5 is a schematic structural view showing a modification of the cover in fig. 2.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 2 to 4, the flow control valve as shown in the figures comprises a cover body 1 and a valve body part 2, wherein the cover body 1 and the valve body part 2 are fixedly connected through a screw 3, and the valve body part 2 is provided with a valve port 21. The flow control valve also comprises a valve rod 4, a valve core part 5, a guide sleeve 6 and a positioning piece 7. The valve rod 4 is provided with an external thread, the cover body 1 is provided with an insertion hole 11, the hole wall of the insertion hole 11 is provided with an internal thread, and the valve rod 4 and the cover body 1 are in threaded connection through matching of the internal thread and the external thread. The valve rod 4 is axially reciprocable relative to the cap body 1. The guide sleeve 6 is fixedly connected with the valve core part 5, and specifically, the guide sleeve and the valve core part can be welded, inserted and fixed or screwed and fixed. The positioning member 7 is cylindrical in this embodiment, and has a central through hole when being used as a component, the positioning member 7 is welded or screwed to the cover 1, the positioning member and the cover are designed separately, which can facilitate the processing of the cover 1, the cover 1 can be integrally cast, specifically, as shown in fig. 3, the cover 1 is an integrated structure and includes a cover 111, a first connecting portion 112 and a second connecting portion 113, in this embodiment, the cover 111 extends in a direction parallel to the axis of the first port a of the valve body 2 and is shaped as a flat plate, the first connecting portion 112 is located in the valve cavity 10 of the valve body 2, the first connecting portion 112 extends from the lower surface of the cover 111 into the valve cavity 10 of the valve body 2 and is cylindrical, and the second connecting portion 113 extends from the upper surface of the cover 111 in a direction away from the valve port 21. That is, the cover portion 111 and the first connection portion 112 are provided in a T-shape, and the second connection portion 113 and the cover portion 111 are also provided in a T-shape. The cover 1' may be a separate structure as shown in fig. 5, that is, the cover 111' is formed as another component, and the cover 111' is welded or screwed to the first connection portion 112' and the second connection portion 113 '. In addition, the cover body 1 and the positioning member 7 may be an integral structure, for example, the cover body 1 and the positioning member 7 are integrally cast, so that the process of fixedly connecting the cover body and the positioning member is omitted, one part is reduced, and the welding process is also reduced.

The first connecting portion 112 is welded and fixed with the positioning member 7 located in the valve chamber 10. Specifically, the inner wall of the positioning member 7 has a first step surface 71, and the lower end of the first connecting portion 112 abuts against the first step surface 71, so that the positioning member and the first connecting portion 112 can be welded after positioning.

The outer peripheral wall of the positioning member 7 includes a first groove 1121 and a second groove 1122, the first groove 1121 and the second groove 1122 are axially spaced apart from each other in the positioning member 7, the first sealing member 1131 is installed in the first groove 1121, and the second sealing member 1132 is installed in the second groove 1122. The inner wall of guide sleeve 6 can be in sliding engagement with first seal 1131 and/or second seal 1132. Compare in the background art, the flow control valve of this scheme for the lid is convenient for process. The guide sleeve 6, the valve core part 5, the valve rod 4, the positioning part 7 and the cover body 1 jointly enclose a back pressure cavity 60, and the back pressure cavity 60 is located in the guide sleeve 6. During the axial sliding of the guide sleeve 6 relative to the positioning element 7, the volume of the back pressure chamber 60 changes accordingly.

Both the first seal 1131 and the second seal 1132 may be provided, or only one of them may be provided, as long as the sealing requirements are satisfied. The function of each seal is to prevent fluid from flowing from the gap between the inner wall of the guide sleeve 6 and the outer wall of the positioning member 7 into the back pressure chamber 60.

As shown in fig. 4, the spool member 5 has a balance passage 50. In the present embodiment, the balance passage 50 communicates the back pressure chamber 60 and the second port B of the valve body member 1, and performs a pressure balance function to prevent the pressure in the back pressure chamber 60 from causing excessive resistance to the valve opening action. In this embodiment, the balance channel 50 is embodied as an axial through hole formed in the spool member 50. It will be appreciated that the shape of the equalization channel 50 is not limited as long as it functions to equalize the pressure.

The valve core component 5 includes a valve core body 51, and in this embodiment, the valve core body 51 is welded and fixed with the guide sleeve 6, or the valve core body 51 is fixed with the guide sleeve 6 by threaded connection, or the valve core body 51 is fixed with the guide sleeve 6 by clamping. The valve core body 51 and the guide sleeve 6 may also be integrally formed, that is, the two are not fixed by the fixing method, and the valve core body and the guide sleeve are of an integral structure.

The spool part 5 further includes a seal ring 52, a fixing piece 53, and a screw 54, and the spool body 51, the seal ring 52, and the fixing piece 53 are fixedly connected by the screw 54. Specifically, the valve body 51 includes a downward step surface, the sealing ring 52 is disposed on the step surface, and the screw 54 presses the sealing ring 52 against the step surface after tightening the valve body 51 and the fixing piece 53. The sealing ring 52 is used to abut against or separate from the valve port 21. When the seal ring 52 abuts against the valve port 21, the balance flow passage 50 communicates the second port B and the back pressure chamber 60.

In order to facilitate connection with the valve rod 4, and facilitate the processing of parts, in this embodiment, the valve core component 5 further includes a connecting piece 55 and a snap ring 8, the connecting piece 55 has an external thread, the valve core body 51 has an internal thread, the connecting piece 55 is in threaded connection with the valve core body 51, the snap ring 8 is clamped at the periphery of the lower end part of the valve rod 4, the snap ring 8 is located at the lower side of the connecting piece 55, the valve rod 4 is connected with the 5 blocks of the valve core component through the snap ring 8, the valve rod 4 can rotate relative to the snap ring 8, during the axial movement of the valve rod 4, the valve rod 4 can drive the snap ring 8 and then drive the 5 axial movements of the valve core component.

The foregoing is merely a description of specific embodiments of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a flow control valve, its characterized in that, includes valve body component, lid, setting element, valve rod, case part and uide bushing, the lid with valve body component fixed connection, the setting element with lid fixed connection or the setting element with lid structure as an organic whole, the uide bushing with case part fixed connection, the uide bushing overcoat the setting element, the uide bushing with setting element sliding fit, the valve rod with the case part is connected, the valve rod can drive the case part with the uide bushing is relative to setting element axial slip, the case part can with flow control valve's valve port butt or separation.

2. The flow control valve according to claim 1, wherein the cover body comprises a cover portion and a first connecting portion, the cover portion is fixedly connected with the valve body component, the first connecting portion is located in a valve cavity of the valve body component, the positioning member is cylindrical, the first connecting portion is welded and fixed with the positioning member, a first groove is formed in an outer wall of the positioning member, a first sealing member is arranged in the first groove, the guide sleeve is cylindrical, and an inner wall of the guide sleeve is in sliding fit with the first sealing member.

3. The flow control valve of claim 2, wherein the valve body member includes a first port and a second port, the cover includes an insertion hole, the valve stem extends through the insertion hole, the cover is threadedly coupled to the valve stem, the first port communicates with the valve chamber and does not communicate with the second port when the valve core member abuts the valve port, the valve core member includes a balance passage, and the flow control valve includes a back pressure chamber within the guide sleeve, the balance passage communicating the back pressure chamber with the second port.

4. The flow control valve according to claim 2, wherein the cover portion and the first connecting portion are of an integral structure or are welded and fixed.

5. The flow control valve of claim 2, wherein the outer wall of the positioning member further comprises a second groove, a second sealing member is disposed in the second groove, and the inner wall of the guide sleeve is in sliding fit with the second sealing member.

6. The flow control valve of claim 2, wherein the cover further includes a second connecting portion located outside the valve chamber, the cover being integrally cast.

7. The flow control valve according to any one of claims 1 to 3, wherein the valve core part comprises a valve core body, the valve core body is connected with the guide sleeve or the valve core body and the guide sleeve are of an integral structure, the valve core part further comprises a sealing ring and a fixing piece, and the valve core body, the sealing ring and the fixing piece are fixedly connected.

8. The flow control valve of claim 7, wherein the spool component further comprises a connector and a snap ring, the connector is in threaded connection with the spool body, and the spool body is clamped with the snap ring.